(Not intended for here - the XF official forums - more an idea for people running XF boards).
A mod that gives people a virtual shop to spend their "likes" in. Stuff like special avatars, group badges, higher PC limit, access to special forums, etc.
But instead of spending cold, hard, cash - you spend "likes".
Something that will hopefully encourage the use of the "like" button and cause people to be more helpful in general (to get likes).
Hell, this may already be in the offing somewhere, but wanted to suggest/share it in case anyone else thought it had any merit?